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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Montville Water Supply

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

29

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.218 ppb41ND - 0.870 ppb
2015ND40ND
2016ND80ND
2017ND40ND
2018ND40ND
2019ND50ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform was proposed in 2018 by the California Office of Environmental Health Hazard Assessment as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-04BG05880TTHMND
2014-05-06BG40996TTHMND
2014-08-05BG87874TTHM0.870 ppb
2014-11-04BH35718TTHMND
2015-02-04BH70134TTHMND
2015-05-05BJ11855TTHMND
2015-08-06BJ69663TTHMND
2015-11-03BK17678TTHMND
2016-02-11BK64140TTHMND
2016-02-25BK69496TTHMND
2016-05-06BN26740TTHMND
2016-05-06BN26731TTHMND
2016-05-06BN26732TTHMND
2016-05-06BN26733TTHMND
2016-08-05BN87197TTHMND
2016-11-01BV72285TTHMND
2017-02-10BX58890TTHMND
2017-05-02BY13294TTHMND
2017-08-03BY77750TTHMND
2017-11-02BZ30948TTHMND
2018-02-07BZ85909TTHMND
2018-05-09CA43477TTHMND
2018-08-07CB06125ND
2018-11-06CB89162ND
2019-02-19CC54031ND
2019-02-19CC54031RND
2019-05-07CD08261ND
2019-08-06CD78474ND
2019-11-05CE54193ND